Side ball-bearing for cars.



Patehted July 3|, I900.

' J. E. NURWOU'D.

SIDE BALL BEARING FOBIJARS.

(Application filed Dec.'6, 1899.)

(No Model.)

Fig.1;

Wit-LE 5 SEE.

Attum1e1+ STATES PA T OFFIQ JOHN E. NORWOOD, OF BALTIMORE, MARYLAND,ASSIGNOR TO THEiBALTI- MORE BALL BEARING COMPANY OF BALTIMORE CITY, OFMARYLAND.

SIDE BALL-BEARING FOR CARS.

SPECIFICATION forming part of Letters latento. 654,755, dated July 31,1900. Applieation filed December 6,1893. Serial No. 739,347. (No model.)

To aZl whom it may concern:-

Be it known that 1, JOHN E. NORWOOD, a citizen of the United States,residing at Baltimore, in the State of Maryland, have inventedcertain'new and useful Improvements in Side Ball-Bearings forOars, ofwhich the following is a specification.

This invention relates to improvements in the construction of sideball-bearings for the bolsters of railroad-cars.

The invention is illustrated in the accom: panying drawings, wherein-Figure 1 is an elevation of a truck-bolster and car-body bolster andshows the applica; tion of the ball-bearing device. Fig. 2 is aninverted plan view of the car-body bolster with the ball-bearing carrierattached. Fig. 8 is a bottom view of the bottom plate of theball-carrier. Fig. 4 is a side view of the bot tom plate. Figs. 5 and 6areend views of the ball-carrier, each figure showing a different end.Fig. 7 is a cross-section view of the ball-carrier and lower plate andshows the position of the parts when pressure comes on the balls, aswhen the car is rounding a curve. Fig. 8 is also a cross-section viewand shows the suspended positionof the ball when the car is running on astraight track. Fig. 9 is a view of the ball-box as seen when (thebottom plate is removed.

This invention isan improvement in that class of car-bolsterball-bearings wherein the balls are normally suspended with their lowerportion protruding through a slot.

The bolster A of the truck is provided at each side of thecenter-bearing with a bearing-plate B, having a smooth level topsurface. The bolster-beam O of the car-body has two ball-carriers D,onebeing secured directly over each of the said lower bearingplates B.The construction of the ball-carrier D constitutes the subject of thepresent invention.

I provide a removable bottom plate D for the ball-carrier, which may berenewed when Worn, and otherwise improve the box that contains theballs. The body or upper part of the ball-carrier has a curved box forthe balls, with a flat inside upper surface e, against which said ballsare allowed to roll laterally as well as horizontally to prevent anysliding friction that would wear or grind the surface of the balls andhas inside concave walls f. The bottom of the side walls is fiat, as atg. The balls are confined in the curved box by a bottom slotted plate D.The

curved slot 2 is wider at the center, midway they will roll by gravitytothe center wide part, where they will hang, as in Fig. 8, until theyagain come into use.

Instead of having the inside upper surface e perfectly fiat, as shown inFigs. 7 and 8, this surface might be slightly concaved crosswise.

The relative size of the balls j and the interior diameter of the box atthe center from one concave sidef to the other is such as to allow theball when seated against the upper inside surface 'eto move or rolllaterally cross= wise on the said upper surface. The interior of thecurved box D is curved from end to end and is wider at the center thanat the ends. (See Fig. 9.) By thus gradually narrowing the interiorwidth of the box toward the ends I limit the side rolling movement ofthe balls when they are at the ends, and thereby prevent the balls frompressing and straining against the beveled edges of the bottom plate andforcing said plate off.

The bottom slotted plate D fits in contact with the fiat surfaces g ofthe side walls of the upper part and is secured by a dovetailshaped bossor lug 70 on one end of the plate, fitting in acorrespondingly-shapedslot 70 at the end of the box or upper part. (SeeFig. 6.) The other end of the bottom plate has an upward flange 0, whichentirely closes the end of the box, and said flange has a hole 10, whichtakes onto a threaded bolt 19, that projects from the end of the box. Anut on the bolt confines the parts. The boss or lug 7t on the bottomplate also has a straight flange provided with a hole Z, and a split pinZ passes through this hole and serves to secure the parts in position incase the nut comes off the bolt 10'. i

The slotted plate D is made removable in order that when it becomesworn, as it will after considerable use, by the vibrationof the v 3. Ina side ball-bearing for railway-cars, 30 balls whichitcarries, it may bereplaced by the combination of a ball-box having'an ina new plate. Itwill be seen that when the side upper surface and side concave walls, f,balls are in contactbetween the upper surjoining said upper surface--theinterior of 5 face e, as in Fig. 7, and the bearing-plate B saidboxbeing curved and wider between the on the bolster there will be nowear or strain side walls at the center than at the ends; a 35 on theslotted plate." I" f removable bottomslotted plate secured to said Theupper-bearing onthe inside of thebox 'box; and balls loose in the box,wherebythe maybe a hard chilled-iron face or maybe an balls when at thecenter are free to have a I 10 inserted steel plate, as shown at ginFigs] side rolling movement but when at the ends and 8. 5' this movementis more limited. v4o

Having thus described my invention, wh at gi Ina side ball-bearing forrailway-cars, I claim as new, and desire to secure by Letters thecombination of a ballbox. curved from Patent,'-is i end toend andprovided atone end with a x 5 1. In a side ball-bearing forrailway-cars; dovetail-shaped slot and the other end open a curvedball-box having a fiat inside upper and provided with a threaded bolt; aremov- 45 surface; balls in said box; and a removable able slotted platewhichconfines theballs and bottom slotted plate, D, secured to thelower' has atone end a'dovetail-shaped boss, and at surfaces of thewalls of said box, whereby the the other end a flange which closes theopen zoballs when seated against said uppersurface end of the box-saidflange having. a hole may protrude through the slotted bottom and whichtakes ontothe said threaded bolt, as 50 have aside, rolling movement, asset forth. shown and described. I I

2. In a side ball-bearing for railway-cars, In testimony whereof I afiixmy signature thehcombination of a curvedball-box for atin the presenceof two witnesses. 2 5 tac ment to the car-body bolster and having a flatinside upper surface, and balls secured JOHN NORWOOD in the box wherebysaid balls when in con Witnesses: r tact with said upper surface mayroll in any CHARLES 13. MANN, Jr., direction- CHARLES VIETsoH.

